Treatment of sugar beet extraction juice stillage by natural coagulants extracted from common bean
2015
Prodanović, Jelena M. (Faculty of Technology, Novi Sad (Serbia)) | Šćiban, Marina B. (Faculty of Technology, Novi Sad (Serbia)) | Antov, Mirjana G. (Faculty of Technology, Novi Sad (Serbia)) | Kukić, Dragana V. (Faculty of Technology, Novi Sad (Serbia)) | Vasić, Vesna M. (Faculty of Technology, Novi Sad (Serbia))
Distillery wastewaters have a great pollution potential, and pollution caused by them is one of the most critical environmental issues. This study is concerned with the coagu- lation efficiency of a new, environmental friendly, natural coagulant extracted from com- mon bean seeds in the primary treatment of distillery wastewater in the bioethanol pro- duction from sugar beet juice. Active coagulation components were extracted from ground seeds of common bean with 0.5 mol/L NaCl. The obtained raw extract was used as a coagulant. The coagulation efficiency was measured by jar test at different pH va- lues of wastewater, and a decrease in organic matter content was determined. The expe- riments confirmed that natural coagulant from common bean could be successfully used for the treatment of extraction juice distillery wastewater. The highest coagulation effici- encies were achieved at the pH 5.2 with a coagulant dose of 30 mL/L, and at the pH 8.5 with a coagulant dose of 5 mL/L, and they were 64.71% and 68.75% respectively. These encouraging results indicate that natural coagulant from common bean seeds is a poten- tial alternative to conventional chemical coagulant/flocculant agents for treatment of wastewaters.
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